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首页> 外文期刊>Journal of Applied Polymer Science >Influence of adding mesocarbon microbeads into C/C composites on microstructure and properties during carbonization
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Influence of adding mesocarbon microbeads into C/C composites on microstructure and properties during carbonization

机译：在炭/炭复合材料中添加中碳微珠对碳化过程中组织和性能的影响

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This work tests the effect on microstructure, flexural strength, flexural moduli, plus the electrical and thermal conductivity of carbon/carbon composites with Mesocarbon Microbeads (MCMBs) content ranging 0-30% by weight during carbonization. These composites were reinforced by oxidative PAN Base fiber felts, and matrix precursor was resol-type-phenolic resin. MCMBs with a weight fraction of 0-30% were added to the matrix to elucidate the effect. Liquid-phase impregnation was applied to reinforce matrix carbon. Cured composites were stabilized at 230 degrees C, then heat-treated at 400, 600, 800, 900 and 1000 degrees C for carbonization. The measured flexural strength after heat-treated at 1000 degrees C was 51.20, 49.59, 43.55, and 38.76 MPa for MCMBs with 0, 10, 20, and 30% added to composites; mean flexural moduli were 1.73, 1.24, 0.73, and 0.57 MPa, respectively. Adding MCMBs reduced both strength and modulus because of cracks and avoids caused by different shrinkage between resin and MCMBs; adding 30 wt % MCMBs raised thermal conductivity of C/C composites from 1.55 to 1.78 W/mK and reduced electric resistivity from 1.8 X 10(-2) to 5.97 x 10(-3) Omega cm. (c) 2006 Wiley Periodicals, Inc.
机译：这项工作测试了碳/碳复合材料在碳化过程中对中碳微珠（MCMBs）含量为0-30％（重量）的影响，对微观结构，弯曲强度，弯曲模量以及电导率和导热率的影响。这些复合材料由氧化PAN基纤维毡增强，基质前体为甲阶酚醛树脂。将重量分数为0-30％的MCMB添加到基质中，以阐明其效果。进行液相浸渍以增强基体碳。将固化的复合材料稳定在230摄氏度，然后在400、600、800、900和1000摄氏度进行热处理以碳化。对于添加了0％，10％，20％和30％的MCMB，在1000℃下热处理后测得的弯曲强度为51.20、49.59、43.55和38.76 MPa。平均弯曲模量分别为1.73、1.24、0.73和0.57 MPa。添加MCMBs会由于裂纹而降低强度和模量，并避免了树脂和MCMBs收缩率不同引起的收缩;添加30 wt％MCMB将C / C复合材料的导热系数从1.55提高到1.78 W / mK，并将电阻率从1.8 X 10（-2）降低到5.97 x 10（-3）Ω·cm。 （c）2006年Wiley Periodicals，Inc.

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